dt-bindings: pinctrl: qcom,ipq6018: increase number of pins in pinmux

dt-bindings: pinctrl: qcom,ipq6018: increase number of pins in pinmux

One pinxmux node can have more than 4 pins to configure:

  ['gpio1', 'gpio3', 'gpio4', 'gpio5', 'gpio6', 'gpio7', 'gpio8', 'gpio10', 'gpio11', 'gpio12', 'gpio13', 'gpio14', 'gpio15', 'gpio17'] is too long

Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20221016170035.35014-11-krzysztof.kozlowski@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>